Due to my annual spending season (winter on-cradle sailing) some tips needed.
As one side coated with four coats of "coppercoat" and another side stripped down to gel I found myself in classic triangle:
1 apply new copper to the both side (if no problem with overcoating)
2 apply epoxy
to stripped side then prime both sides and apply hard antifouling
3 unknown idea or worst scenario of stripping another side as well.